July for the ones from the download page) and so Windows prefers it over them. Then, go to the old driver that should work (3.8 or 3.5), and install in compatibility mode. The problem is probably that the non-working driver is the newest (September 2021 vs. To make this work in Windows 11, you will need to completely remove the installed driver. I had only one other entry, a "ser2pl.inf" version " 3.8.40.0".ĭisconnect the device, and "pnputil /delete-driver oemXY.inf" with the INF file you located in the previous step.Ĭonnect the device again, and it should work, at least, it does for me. Then "pnputil /enum-drivers", and in the output look for Prolific drivers other than the ones from the previous step. It will add the two driver packages to the driver store and tell you what oemXY.inf files it has assigned to them. What I did is this:įirst install the downloaded driver by unpacking the zip file and "pnputil /add-driver *.inf /subdirs /install" (the /install is probably not necessary) from the extracted "Win11_DCHU" directory. The Programming port behaves like the Unos serial port in that the USB-to-Serial chip resets the board each time you open the serial monitor (or any other serial communication). Getting it installed is a bit tricky, it seems.
Remove the USB programming cable from your PC. Installing the Legacy Prolific PL-2303 Driver. This driver will work for with both the Prolific clone and the genuine (older) Prolific chip-set. There is a working driver at, a bit down the page listed as "DCHU (for PC Vendors)". This may be the driver you need if you see the following error: Device Manager> 'Other Devices'> 'USB-Serial Controller' is proceeded by a YELLOW warning.
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